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For the Inventor, By the Inventor

Tokyo, Japan

Nobuyoshi Takeuchi

This inventor holds 18 USPTO granted patents, primarily in Nonvolatile Memory Devices. Top assignees: Nkk Corporation, Nemoto & Company, Ltd., Macronix International Co., Ltd.. Active years: 1993-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Nobuyoshi Takeuchi. Retrieved from https://idiyas.com/inventor/nobuyoshi-takeuchi-23k1mhpr

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 18

% Patents Active = 100.0

Average Co-Inventor Count = 1.2

ph-index = 9

Forward Citations = 396(Granted Patents)


Company Filing History:

goldMedal13 out of 614 
 
Nkk Corporation
 patents
silverMedal5 out of 16 
 
Nemoto & Company, Ltd.
 patents
bronzeMedal3 out of 3,609 
 
Macronix International Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1993-2008

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Areas of Expertise:
Phosphorescent Phosphor
Nonvolatile Memory
Semiconductor Device
Verify Function
Memory Cells
MOS Transistor
Floating Gate
Diffusion Layer
Reference Apparatus
Gate Insulation Film
Mask ROM
Information Reading
18 patents (USPTO):Explore Patents
1. 7427365 - Phosphorescent phosphor and method of manufacturing thereof (2008-09-23),
2. 7422704 - Phosphorescent phosphor and method of manufacturing thereof (2008-09-09),
3. 6005805 - Nonvolatile semiconductor device with a verify function (1999-12-21),
4. 5953610 - Method of fabricating non volatile memory device with memory cells which (1999-09-14),
5. 5940704 - Method of manufacturing a reference apparatus (1999-08-17),
6. 5936277 - MOS transistor with impurity-implanted region (1999-08-10),
7. 5907183 - Non-volatile semiconductor memory device (1999-05-25),
8. 5898614 - Non-volatile semiconductor memory device (1999-04-27),
9. 5886927 - Nonvolatile memory device with verify function (1999-03-23),
10. 5815433 - Mask ROM device with gate insulation film based in pad oxide film and/or (1998-09-29),
11. 5793078 - Non-volatile semiconductor memory device and method of fabricating (1998-08-11),
12. 5766997 - Method of forming floating gate type non-volatile semiconductor memory (1998-06-16),
13. 5686022 - Phosphorescent phosphor (1997-11-11),
14. 5684739 - Apparatus and method for determining current or voltage of a (1997-11-04),
15. 5661056 - Non-volatile semiconductor memory device and method of manufacturing the (1997-08-26),

Title: Nobuyoshi Takeuchi: Innovator in Phosphorescent Phosphors

Introduction

Nobuyoshi Takeuchi is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of phosphorescent materials, holding a total of 18 patents. His work focuses on enhancing the characteristics of phosphorescent phosphors, which are essential in various applications.

Latest Patents

Takeuchi's latest patents include innovative methods for manufacturing phosphorescent phosphors with exceptional afterglow luminance characteristics. One of his notable inventions is a phosphorescent phosphor that performs well even under low illumination intensity. This phosphor surpasses conventional strontium aluminate phosphorescent phosphors in terms of initial afterglow luminance. The specific requirements for this phosphor include parameters such as 0.015 < Eu/(Sr+Eu+Dy) ≤ 0.05, 0.4 ≤ Dy/Eu ≤ 2, and 2.02 ≤ Al/(Sr+Eu+Dy) ≤ 2.4. Another patent focuses on a phosphorescent phosphor that maintains excellent afterglow luminance characteristics at 60 and 90 minutes after excitation cessation, with requirements like 0.015 < Eu/(Sr+Ba+Eu+Dy) ≤ 0.05, 0.3 ≤ Dy/Eu ≤ 2, and 2.1 ≤ Al/(Sr+Ba+Eu+Dy) ≤ 2.9.

Career Highlights

Throughout his career, Takeuchi has worked with notable companies such as NKK Corporation and Nemoto & Company, Ltd. His experience in these organizations has contributed to his expertise in the development of advanced phosphorescent materials.

Collaborations

Takeuchi has collaborated with esteemed colleagues, including Yoshihiko Murayama and Yasumitsu Aoki. These partnerships have fostered innovation and the exchange of ideas in the field of phosphorescent technology.

Conclusion

Nobuyoshi Takeuchi is a distinguished inventor whose work in phosphorescent phosphors has led to significant advancements in the field. His patents reflect a commitment to improving afterglow luminance characteristics, making him a key figure in this area of innovation.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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